Piston-cooling assembly



Patented July .7, 1925 UNITED STATES LOUIS R. FORD, OF NEW YORK, N. Y., ASSIGNOR T0 WORTHINGTON PUMP AND MA- CHINERY GORIORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA.

PISTON-OOOLING ASSEMBLY.

Application ma June 14, 1921. Serialno. 477,478,

To all whom it may concern:

Be it known that I, Louis B. FoRn,a citizen of the United States, residing at New York city, county of Kings, and State of New York, have invented certain-new and useful Improvements in Piston-Cooling Assemblies, fully described and represented in the following specification and the accompanying drawings, forming a part of the same. I I

This invention relates to an improvement in piston cooling assembly for internal combustion engines.

The invention aims especially to prevent the objectionable feature of splashing of cooling liquid from the telescoping tubes adapted to circulate the cooling liqiiid. Difiiculty has heretofore been experienced with such cooling systems, .due to the fact that the splash hood over the end of the stationary tube must necessarily be provided with large clearance around the reciprocating tube to prevent rubbing against the hood on any sideplay or misalinement of the tubes due to wear of the engine parts or otherwise, such clearance also being necessary to prevent bending or breaking of the tubes in case of misa-linement. In this character of apparatus a large amount of cooling liquid adheres to the outside of the reciprocating tube and is carried up with it beyond the splash hood and, on the sudden reversal of the piston to which such reciprocating tube is secured, this liquid is jerked therefrom, due. to the inertia of the upwardly moving liquid with respect to the tube, With the result that the cooling liquid is sprayed into the cylinder base or over the piston rods. The present invention overcomes this difiiculty by simple, vefficient and durable means.

For a full understandingof the invention, a construction embodying the same in a preferred form, will now be described in connection with the accompanying drawings,

and the novel features thereof then be pointed out in the claims.

In the drawings' Figure 1 is an elevation, partly in section,

ofan engine power cylinder, the member or partition separating it from the crank pit, and the general location of the present invention with respect to such parts;

Figure 2 is an enlarged central section of a portion of an engine piston, showing the H of Fig. 3

splashhood and sealing cially to Fig. 2, the engine piston A to be cooled has secured thereto in the usual manner a cooling liquid circulating tube 10 adapted to reciprocate in a tube 11 supported by the member B. Over the top of the stationary tube 11 and preferably also secured to the member B in any convenient manner, is a splash hood 1, the orifice 2 in the top of which is sufficiently large to provide ample clearance around the tube 10 in the event of any sideplay of such tube due to wear or otherwise of the engine parts.

In order to prevent cooling liquid adher- Referring now to the drawings, and espethe clearance orifice 2 in the top thereof, 4

with the consequences above stated, there is provided within the hood 1 and mounted on the tube 10' a combined packing and wiping ring 3, which is of smaller diameter than the inside diameter of the hood to allow for movement sidewise as above explained. The ring 3 is preferably made of brass and in two parts, secured together as shown or in any other suitable manner, the orifice in such ring being slightly larger than the diameter of the piston 10, and such ring is also preferably provided with an interior groove for retaining suitable packing. This packing is preferably of braided flax, cut square in cross-section as shown at 4, Fig. 4. This material has been found to be durable and to maintain a tight fit around, the tube 10, which is necessary for eflicient operation of the device. The splash hood chamber is preferably enlarged by making the hole in the member B through which'the tube ll passes larger than such tube, so as to form an annular catch basin 5. The tube 11 is also provided with a flange 6 having an annular chamber 7 therein corresponding in size to the hole in the member B and. registeringthe'rewith, and is tapped at 8 by a pipe leading to any desired point, to permit v as the tube 10 is withdrawn from the tube 11 on the upward stroke of the piston A, liquid adhering to the exterior of the tube 10 will be wiped therefrom by the combined packing and wiping ring 3 and, as such ring fits the tube 10 snugly, it will be carried against the top of the splash hood l on slight up ward movement of the tube, thereby effectually sealing the orifice 2 against passage of liquid wiped off the tube 10 by the ring and collecting in the splash hood 1, to be drained therefrom through outlet 3 leading to any desired point. To prevent the ring 3 from having too great a movement within the hood l, there are provided a plurality of lugs 9 on which such ring seats during the downstroke of the piston. This effectually prevents battering of the rin against the tops of the splash hood and tu e 11, respectively, as would be the case if it had a; long range of movement.

It will be understood that various changes may be made in the construction and still be within the scope of the appended claims.

What is claimed is:

1. In a piston cooling assembly for enines, the combination with the reciprocating cooling water tube thereof, of a hooded chamber having an orifice through which the tube passes, and means in said chamber for simultaneously wiping the exterior of the tube and closing the hood orifice as said tube is withdrawn from the chamber.

2. In a piston cooling assembly for engines, the combination with the reciprocating and stationary telesco ing tubes thereof, of a hood having an ori ice through which the reciprocating tube passes, and a wiping sealing ring carried by and movable on the I reciprocating tube and confined in said hood for closing said orifice as the reciprocating tube is withdrawn from the hood, and a support within said hood for limiting the movement of said ring.

In testimony whereof, I have hereunto set my hand.

LOUIS RuFORD. 

